Thank you for your answer.
I had to make again my customizations on the theme files and now it’s perfect.
I just had one little thing, it seems that the update made the top bar bigger. So I had this to my custom css to have it as I want :
header#primary {
height: 30px;
}
It’s now perfect !! My client is happy and I’m too.
Well done for your job, I’ll definitely will recommend and use your themes for now.
Have a great day,
Cheers,
Jordan